Sewing-machine power-transmitter.



J. FISCHER & D. BRANDENS TEIN.

SEWING MACHINE POWER TRANSMITTER. APPLICATION FILED JAN.27, 1915.

1,156,137. Patented Oct. 12, 1915.

2 SHEETS SHEEI l.

dlmm f J. FISCHER & D. BRANDENSTEIN.

SEWING MACHINE POWER TRANSMITTER.

APPLICATION FILED :AN.21, 1915.

1,156137. Patented Oct. 12, 1915.

2 SHEETS-SHEET 2.

IIIIIIIIIIIIIII III] COLUMBIA PLANOGRAPH co., WASHINGTON, D. c.

UNITED STATES PATENT QFFEQE;

JACOB FISCHER, OF EQSEYILLE, NEW JERSEY, AND DANIEL BRANDENSTEIN, OF NEW YORK, N. Y.

SEWINGMAGHINE POWER-TRANSMITTER.

Application fi1ed January 27, 1915.

To all, whom it may concern:

Be it known that we, JaooB FIsoHER, a citizen of the United States, and a resident of Roseville, county of Essex, State of New Jersey, and DANIEL BRANDENSTEIN, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Sewing- Machine Power-Transmitters, of which the following is a specification.

The object of the present invention is the construction of a power driven sewing machine transmitter wherein practically all the moving par-ts beneath the sewing machine table are inclosed and belting is; employed only in the last stage of the power transmitting mechanism, namely, between the machine head pulley and a pulley which obtains its rotation by the train of mechanism parts or the breaking of the belting in proximity with the operators. knees. The construction of our invention permits, moreover, of the adaptation of the power transmitting mechanism to practically every standard type of sewing machine Without requiring any change or alteration in the sewing machine proper and permits, further, of the adjustment of the sewing machine proper at any desired point, forward or backward, of the sewing machine table. lVith regard to the two latter features our present invention is an improvement over the pending application of Jacob Fischer, for sewing machine power transmitter, filed November 11, 1914, Serial No, 871369.

In the accompanying drawings. Figure 1 represents an end or side view of our improved transmitter mechanism, with the easing for inclosing the parts and the sewing machine table partly in section; Fig. 2 rep-. resents a front elevation of the same, showing the pulley and belting transmitting movement from the transmitter mechanism to the pulley of the sewing machine head; Fig. 3 is a view similar to Fig. 1 on an enlarged scale and omitting the sewing machine head, the foot treadle, the standard supporting the sewing machine table and the standard supporting the casing surrounding the box which incloses the main Specification of Letters Patent.

Patented Got. 12, 1915.

Serial No. 4,588.

driving shaft and the gears cooperating therewith; Fig. a represents a sectional front view of our device, and Fig. 5 is a detailed plan view of the upper clutch member and the cooperating upper end of the treadle lever with its two anti -friction rollers.

In these drawings, 1 represents a sewing machine table of ordinary construction; 2 a sewing machine head supported thereon; 3 the hand wheel. common to such sewing machine heads, which is made fast upon the end of the driving shaft l of such sewing machine head; 5 is a pulley also rigidly secured upon'said shaft 4 carrying belting 5,; 6. represents the primary power transmitting shaft supported in bearings. below the table 1, andprovided witha gear wheel '7 rigidly secured thereon so as to rotate with said shaft 6; 8 represents a beveled gear which is in continuous mesh with the gear 7 of the main driving shaft and is rigidly secured to a shaft 9'extending upwardly and through an opening or bearing 9 in the box inclosing the gears 7 and 8. This shaft 9 extends partway upwardly in the direction of the sewing machine head and carries a clutch member 11 which is fastened thereon in any suitable manner, as by a cotter pin 12, so that the rotation of the journal 9 causes member 11 to rotate with it.

Parallel with the main driving shaft 6 and a short distance below the under side of the table 1, we provide a counter shaft 13 secured in appropriate bearings 1717 and carrying, rigidly secured thereto, a beveled gear 14 and a pulley 15, said pulley 15 being substantially in a vertical line with the pulley 5 on the sewing machine head 2. This counter driving shaft 18 may be supported from the under side of the sewing machine table by a bracket 16 and its adjustable component 16, which serves as a support for the bearings l7l7 and also for a box 38, 39, inclosing a portion of the shaft 13, the beveled gear 14L secured thereon and the gear 19 meshing therewith; this gear 19 is rigidly secured upon the upper end of a shaft 20, said shaft extending shaft 20 we provide a clutch member 22 having an upwardly extending sleeve 23, the said. sleeve being provided with a groove 24 which engages with a projecting lip 25 of the shaft 20 so that the sleeve 23 and its clutch member will cause the shaft 20 to rotate therewith whenever rotation is imparted to the clutch member 22 by its engagement with the lower clutch member 11.

It will be noted thatin the construction shown the sleeve 23 of the clutch member 22 extends over the lower end of the shaft 20 and also over the upper end of the shaft 9 and serves to keep the two ends of the re spective'shafts in proper alinement with one another. It will also be noted that the sleeve 23 is capable of an up and down movement along the lip 25 of the shaft 20. lVhen not in operation, the clutch member 22 is maintained in its raised position by means of a spring 26, the upper end of which engages a collar 27 which may be secured upon the shaft 20, and the lower end of which engages a lug 28 provided upon the sliding clutch sleeve 23 so that the tension of this spring serves to maintain the said clutch member 22 out of contact with the cooperating clutch memberll. In order to bring the clutch member 22 into engagement with the cooperating clutch member 11, we provide a lever 29 having a treadle 30. The upper end of said lever 29 may be made forked, as shown at 31, one prong of said fork being located at either side of the sleeve 23 and each prong supporting an anti-friction roller 32 which contacts with the upper surface of the clutch member 22 to depress the same.

In conjunction with the mechanism above described, we provide casings 33, 3d and 35 to inclose the main driving shaft 6 and the gears? and 8 to protect the operator from contact therewith. VJ e also provide for the like purpose a box or casing 36, 37 inclosing the shafts 9 and 20 and their respective clutch members and a box 38, 39 inclosing the gears 19 and 14: and a portion of the driven-shaft 13. In the box 36, 37 an opening 36 is provided to permit the introduction of the upper end of the lever 29, said opening being suiiiciently large to enable the said lever 29 to move downwardly and upwardly as in depressing it or relieving the pressure thereon.

We shall now briefly describe the operation of our device: Assuming the parts to be in the position shown in rigs. 1, 3 and 4 and the main driving shaft 6 to be rotated, it follows that the gear 7 rotates therewith and that the gear 8, the shaft 9 and the driving clutch 11 are in turn rotated by said gear 7, the journal 9 revolving idly in the bore of the sleeve 23. All the mechanism thereabove remains inert. It is desired now to bring the ewing machine head into operation and to this end the treadle 30, the lever 29 and its anti-friction rollers 32 are depressed forcing the sliding clutch member 22 downwardly against the tension of the spring 26 and into engagement with the clutch member 11. By reason of this engagement the clutch member 22 will cause the shaft 20 to rotate in unison with both clutch members 11 and 22, transmitting rotary motion through the gear. 19 to the gear 14: on the shaft 13 and therethrough to the pulley 15 which in turn through the belting 5 results in the rotation of the shaft 4 of the sewing machine head. Variations of speed between the clutch members 11 and 22 may be attained by variation in pressure upon the treadle 30 so that there will be a certain amount of lost motion between the respective clutch members. in case the sewing machine head is desired to be operated at full speed the full depression of the treadle 30 will bring the two clutch members into firm contact and in that case the full speed of the shaft 9 will be communicated to the shaft 20 and its connected parts.

It will be noted from the foregoing description that with the exception of the belting for the sewing machine head we are enabled entirely to dispense with the belting beneath the operating table thus protecting the operator from the frequent injury caused by the breakage of belting beneath the operating table; that we are enabled, further, to permanently inclose all the moving parts, thus protecting the operator from the dangers of contact therewith; and that the casings for such parts, notably the box 34, 35 and the box 38, 39 may advantageously be utilized to hold lubricants for the meshing gears. It will also be noted that the gears remain permanently and positively in engagement with their cooperating gears and that it is not necessary, if operation of the sewing machine is to be suspended, to throw them out of contact therewith. It will also be noted that our present device is adaptable for use in conjunction with all the various makes of power driven sewing machines now on the market and in use, without necessitating any alteration in or addition to such sewing machines.

While we have shown our improvement in one specific form by way of example, it will be understood, of course, that variations in detail may readily be made therein without nection with the shaft of the sewing machine head; an intermediate shaft; abeveled gear located at each end of said intermediate shaft, in mesh with the gears upon said main driving shaft and said counter driving shaft, respectively, whereby saidmain and counter driving shafts are connected; a clutch interposed in and controlling the connection of said belt pulley with said main driving shaft.

2. A power transmitter for sewing machines comprising a main driving shaft supported beneath the sewing machine table; a beveled gear upon said main driving shaft; a counter driving shaft; a beveled gear carried by said counter driving shaft; a belt pulley on said counter driving shaft for connection with the shaft of the sewing ma chine head; an intermediate shaft; a beveled gear located at each end of said intermediate shaft, in mesh with the gears upon said main driving shaft and said counter driving shaft, respectively, whereby said main and counter driving shafts are connected; a clutch interposed in and controlling the connection of said belt pulley with the main driving shaft; and a treadle to actuate said clutch.

3. A power transmitter for sewing machines comprising a main driving shaft located beneath the sewing machine table; a beveled gear upon said main driving shaft; a counter driving shaft; a beveled gear carried by said counter driving shaft; a belt pulley on said counter driving shaft for connection with the shaft of the sewing machine head; an intermediate shaft; a beveled gear located at each end of said intermediate shaft, in mesh with the gears upon said main driving shaft and said counter driving shaft, respectively, whereby said main and counter driving shafts are connected; a

clutch interposed in and controlling the connection of said belt pulley with said'main driving shaft, means for maintaining said clutch in inoperative position and a treadle to actuate said clutch.

4. A power transmitter for sewing machines comprising a substantially horizontal main driving shaft supported beneath the sewing machine table; a beveled gear upon said main driving shaft; a counter driving shaft, substantially parallel with said main driving shaft; a beveled gear carried by said counter driving shaft; a belt pulley on said counter driving shaft for connection with the shaft of the sewing machine head; a transverse intermediate shaft; a beveled gear located at each end of said transverse intermediate shaft, in mesh with the gears upon said main driving shaft and said counter driving shaft, respectively, whereby said main and counter driving shafts are connected; a clutch interposed in and controlling the connection of said belt pulley with said main driving shaft.

5. A power transmitter for sewing machines comprising a substantially horizontal main driving shaft supported beneath the sewing machine table; a beveled gear upon said main driving shaft; a counter driving shaft, substantially parallel with said main driving shaft; a beveled gear carried by said counter driving shaft; a belt pulley on said counter driving shaft for connection with the shaft of the sewing machine head; a transverse intermediate shaft; a beveled gear located at each end of said transverse intermediate shaft, in mesh with gears upon said main driving shaft and said counter driving shaft, respectively, whereby said main and counter driving shafts are connected; a clutch interposed in and controlling the connection of said belt pulley with the main driving shaft, and a treadle to actuate said clutch.

6. A power transmitter for sewing machines comprising a main driving shaft supported beneath the sewing machine table; a beveled gear upon said main driving shaft; a counter driving shaft; a beveled gear carried by said counter driving shaft; a belt pulley on said counter driving shaft for connection with the shaft of the sewing machine head; an intermediate shaft; a beveled gear located at each end of said intermediate shaft, in mesh with the gears upon said main driving shaft and said counter driving shaft, respectively, whereby said mam and counter driving shafts are connected; a-

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, 0. 

